The word for convenient: べんり、つごうがいい

Elevators, escalators, bullet trains are べんり "benri" . They make life easier, and in that sense, are "convenient". Having to ride the train during crowded rush hour is ふべん ("fuben") "inconvenient"。

On the other hand, when something is convenient in the sense that it matches your schedule, the word to use in not べんり, but rather つごうがいい. When something is inconvenient for your schedule, then you use つごうがわるい。